Image capturing optical lens assembly

ABSTRACT

An image capturing optical lens assembly includes, in order from an object side to an image side, a first lens element with positive refractive power having a convex object-side surface and a concave image-side surface, a second lens element with negative refractive power, a third lens element with negative refractive power having a concave object-side surface and a convex image-side surface, and a fourth lens element with refractive power having a concave image-side surface. The object-side surface and the image-side surface of the fourth lens element are aspheric. Either or both of the object-side surface and the image-side surface have at least one inflection point formed thereon.

RELATED APPLICATIONS

The application claims priority to Taiwan Application Serial Number100117256, filed May 17, 2011, which is herein incorporated byreference.

BACKGROUND

1. Technical Field

The present invention relates to an image capturing optical lensassembly. More particularly, the present invention relates to a compactimage capturing optical lens assembly applicable to electronic products.

2. Description of Related Art

In recent years, with the popularity of mobile products with camerafunctionalities, the demand for compact image capturing optical lensassemblies is increasing. The sensor of a conventional photographingcamera is typically a CCD (Charge-Coupled Device) image sensor or a CMOS(Complementary Metal-Oxide-Semiconductor) sensor. As advancedsemiconductor manufacturing technologies have allowed the pixel size ofsensors to be reduced and compact image capturing optical lensassemblies have gradually evolved toward higher megapixels, there is anincreasing demand for compact image capturing optical lens assembliesfeaturing better image quality.

A conventional compact image capturing optical lens assembly in aportable electronic product typically utilizes a three-element lensstructure. Such a conventional image capturing optical lens assembly hasa first lens element with positive refractive power, a second lenselement with negative refractive power and a third lens element withpositive refractive power. The first, second and third lens elements arearranged in this order from an object-side to an image-side. While thethree-element lens structure is compact, it is not able to produce highquality images.

Another conventional compact image capturing optical lens assemblyprovides a four-element lens structure. The first lens element and thesecond lens element of the four-element lens structure are two glassspherical lens elements which are attached to each other to form adoublet lens for eliminating chromatic aberration. However, this lensstructure requires a longer total optical track length caused byinsufficient degrees of freedom in setting system parameters due to toomany spherical lenses allocated. Moreover, it is not easy to attach theglass lenses, and thus the manufacturing process for forming the glassdoublet lenses is difficult.

SUMMARY

According to one aspect of the present disclosure, an image capturingoptical lens assembly includes, in order from an object side to an imageside, a first lens element, a second lens element, a third lens elementand a fourth lens element. The first lens element has positiverefractive power and has a convex object-side surface and a concaveimage-side surface. The second lens element has negative refractivepower. The third lens element has negative refractive power and has aconcave object-side surface and a convex image-side surface. The fourthlens element has refractive power and has a concave image-side surface.The object-side surface and the image-side surface of the fourth lenselement are aspheric, and the fourth lens element has at least oneinflection point formed on at least one of the object-side surface andthe image-side surface thereof. When a focal length of the imagecapturing optical lens assembly is f, a focal length of the third lenselement is f3, an axial distance between the first lens element and thesecond lens element is T12, an axial distance between the third lenselement and the fourth lens element is T34, a curvature radius of theobject-side surface of the second lens element is R3, and a curvatureradius of the image-side surface of the second lens element is R4, thefollowing relationships are satisfied:−1.5<f/f3<−0.2;0<T34/T12<2.1; and(R3+R4)/(R3−R4)<1.0.

According to another aspect of the present disclosure, an imagecapturing optical lens assembly includes, in order from an object sideto an image side, a first lens element, a second lens element, a thirdlens element and a fourth lens element. The first lens element haspositive refractive power and has a convex object-side surface and aconcave image-side surface. The second lens element has negativerefractive power. The third lens element has negative refractive powerand has a concave object-side surface and a convex image-side surface.The fourth lens element has refractive power and has a convexobject-side surface and a concave image-side surface. The object-sidesurface and the image-side surface of the fourth lens element areaspheric, and the fourth lens element has at least one inflection pointformed on at least one of the object-side surface and the image-sidesurface thereof. When a focal length of the image capturing optical lensassembly is f, a focal length of the third lens element is f3, an axialdistance between the first lens element and the second lens element isT12, an axial distance between the third lens element and the fourthlens element is T34, the Abbe number of the second lens element is V2,and the Abbe number of the third lens element is V3, the followingrelationships are satisfied:−1.2<f/f3<−0.3;0<T34/T12<2.1; and23<V3−V2<42.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of an image capturing optical lens assemblyaccording to the first embodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the first embodiment;

FIG. 3 is a schematic view of an image capturing optical lens assemblyaccording to the second embodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the second embodiment;

FIG. 5 is a schematic view of an image capturing optical lens assemblyaccording to the third embodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the third embodiment;

FIG. 7 is a schematic view of an image capturing optical lens assemblyaccording to the fourth embodiment of the present disclosure;

FIG. 8 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the fourth embodiment;

FIG. 9 is a schematic view of an image capturing optical lens assemblyaccording to the fifth embodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the fifth embodiment;

FIG. 11 is a schematic view of an image capturing optical lens assemblyaccording to the sixth embodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the sixth embodiment;

FIG. 13 is a schematic view of an image capturing optical lens assemblyaccording to the seventh embodiment of the present disclosure; and

FIG. 14 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the seventh embodiment.

DETAILED DESCRIPTION

An image capturing optical lens assembly includes, in order from anobject side to an image side, a first lens element, a second lenselement, a third lens element and a fourth lens element. The imagecapturing optical lens assembly further includes an image sensor locatedon an image plane.

The first lens element with positive refractive power provides partialrefractive power for reducing the total track length of the imagecapturing optical lens assembly so as to maintain the compact size ofthe image capturing optical lens assembly. The first lens element has aconvex object-side surface and a concave image-side surface, so that theastigmatism of the image capturing optical lens assembly can becorrected.

The second lens element with negative refractive power can correct theaberration generated from the first lens element and can further correctthe chromatic aberration of the image capturing optical lens assembly.

The third lens element with negative refractive power can provide adistribution of the refractive power of the image capturing optical lensassembly, so that the error sensitivity of the image capturing opticallens assembly can be reduced, and the manufacture of the image capturingoptical lens assembly is more easily realized. The third lens elementhas a concave object-side surface and a convex image-side surface, suchas a meniscus, so that the astigmatism of the image capturing opticallens assembly can be corrected.

The fourth lens element can have positive refractive power or negativerefractive power. When the fourth lens element has positive refractivepower, the high-order aberration of the image capturing optical lensassembly can be corrected so as to enhance the resolution of the imagesthereof. When the fourth lens element has negative refractive power andhas a concave image-side surface, the principal point of the imagecapturing optical lens assembly can be positioned away from the imageplane so as to reduce the back focal length thereof. Therefore, thetotal track length of the image capturing optical lens assembly can bereduced while maintaining the compact size thereof. Moreover, when thefourth lens element has at least one inflection point formed on at leastone of the object-side surface and the image-side surface thereof, theincident angle of the off-axis field of light on the image sensor can beeffectively minimized and the aberration of the off-axis field can becorrected.

When a focal length of the image capturing optical lens assembly is f,and a focal length of the third lens element is f3, the followingrelationship is satisfied:−1.5<f/f3<−0.2.

Therefore, the refractive power of the third lens element can correctthe aberration of the image capturing optical lens assembly and reducethe photosensitivity thereof.

f and f3 can further satisfy the following relationship:−1.0<f/f3<−0.5.

Furthermore, f and f3 can satisfy the following relationship:−1.2<f/f3<−0.3.

When an axial distance between the first lens element and the secondlens element is T12, and an axial distance between the third lenselement and the fourth lens element is T34, the following relationshipis satisfied:0<T34/T12<2.1.

Therefore, the fabrication of the lens elements is more easily realized.Furthermore, the total track length of the image capturing optical lensassembly can be reduced.

T12 and T34 can further satisfy the following relationship:0<T34/12<1.0.

When a curvature radius of the object-side surface of the second lenselement is R3, and a curvature radius of the image-side surface of thesecond lens element is R4, the following relationship is satisfied:(R3+R4)/(R3−R4)<1.0.

Therefore, the shape of the surfaces of the second lens element canmaintain the refractive power thereof, so that the aberration generatedfrom the first lens element can be corrected. Moreover, the negativerefractive power of the third lens element can reduce the sensitivity ofthe error of the image capturing optical lens assembly, so thatmanufacture can be more easily realized.

When the Abbe number of the second lens element is V2, and the Abbenumber of the third lens element is V3, the following relationship issatisfied:23<V3−V2<42.

Therefore, the chromatic aberration of the image capturing optical lensassembly can be corrected.

When a curvature radius of the object-side surface of the third lenselement is R5, and a curvature radius of the image-side surface of thethird lens element is R6, the following relationship is satisfied:−0.5<(R5−R6)/(R5+R6)<−0.2.

When the above relation is satisfied, the shape of the surfaces of thethird lens element can correct the astigmatism. At the same time, thesensitivity of the manufacturing error of the image capturing opticallens assembly can be reduced.

When a focal length of the second lens element is f2, and the focallength of the third lens element is f3, the following relationship issatisfied:0.7<f2/f3<1.3.

Therefore, the refractive power of the second lens element and the thirdlens element can reduce the sensitivity of the manufacturing error ofthe image capturing optical lens assembly.

When the Abbe number of the first lens element is V1, and the Abbenumber of the second lens element is V2, the following relationship issatisfied:30<V1−V2<45.

Therefore, the chromatic aberration of the image capturing optical lensassembly can be further corrected.

When a central thickness of the third lens element is CT3, and a centralthickness of the fourth lens element is CT4, the following relationshipis satisfied:0.25<CT3/CT4<0.6.

Therefore, the thickness of the third lens element and the fourth lenselement can reduce the total track length of the image capturing opticallens assembly.

When a half of a diagonal length of an effective photosensitive area ofthe image sensor is ImgH, and the axial distance between the object-sidesurface of the first lens element and the image plane is TTL, thefollowing relationship is satisfied:TTL/ImgH<2.0.

Therefore, the total track length of the image capturing optical lensassembly can be reduced, so as to maintain the compact size of theoptical image system. As a result, the image capturing optical lensassembly may be applied to lightweight and portable electronic products.

According to the image capturing optical lens assembly of the presentdisclosure, when the lens element has a convex surface, this indicatesthat the paraxial region of the surface is convex, and when the lenselement has a concave surface, this indicates that the paraxial regionof the surface is concave.

According to the image capturing optical lens assembly of the presentdisclosure, the lens element can be made of glass material or plasticmaterial. When the lens element is made of glass material, there is ahigher degree of freedom in design parameters of the image capturingoptical lens assembly. When the lens element is made of plasticmaterial, the cost of manufacture can be effectively reduced. Moreover,the surface of the lens element can be aspheric, so that it is easier tomake the surface into other non-spherical shapes. As a result, morecontrollable variables are obtained, the aberration is reduced and thenumber of required lens elements is reduced. Therefore, the total tracklength of the image capturing optical lens assembly can be reduced.

According to the image capturing optical lens assembly of the presentdisclosure, the image capturing optical lens assembly can include atleast one stop for reducing stray light while retaining high imagequality. Furthermore, when the stop is an aperture stop, the position ofthe aperture stop within an optical system can be arbitrarily placed infront of the entire optical system or within the optical systemdepending on the preference of the designer of the optical system, inorder to achieve the desirable optical features or higher image qualityproduced from the optical system.

According to the above description of the present invention, thefollowing 1st-7th specific embodiments are provided for furtherexplanation.

FIG. 1 is a schematic view of an image capturing optical lens assemblyaccording to the first embodiment of the present disclosure. FIG. 2shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the first embodiment. In FIG. 1, the image capturing optical lensassembly includes, in order from an object side to an image side, anaperture stop 100, the first lens element 110, the second lens element120, the third lens element 130, the fourth lens element 140, an IR(infrared) cut filter 160 and an image plane 150.

The first lens element 110 is made of plastic material. The first lenselement 110 has positive refractive power and has a convex object-sidesurface 111 and a concave image-side surface 112. The object-sidesurface 111 and the image-side surface 112 of the first lens element 110are aspheric.

The second lens element 120 is made of plastic material. The second lenselement 120 has negative refractive power and has a concave object-sidesurface 121 and a concave image-side surface 122. The object-sidesurface 121 and the image-side surface 122 of the second lens element120 are aspheric.

The third lens element 130 is made of plastic material. The third lenselement 130 has negative refractive power and has a concave object-sidesurface 131 and a convex image-side surface 132. The object-side surface131 and the image-side surface 132 of the third lens element 130 areaspheric.

The fourth lens element 140 is made of plastic material. The fourth lenselement 140 has positive refractive power and has a convex object-sidesurface 141 and a concave image-side surface 142. The object-sidesurface 141 and the image-side surface 142 of the fourth lens element140 are aspheric. The fourth lens element 140 has inflection pointsformed on the object-side surface 141 and the image-side surface 142thereof.

The IR cut filter 160 is made of glass and located between the fourthlens element 140 and the image plane 150, and will not affect the focallength of the image capturing optical lens assembly.

The equation of the aspheric surface profiles of the aforementioned lenselements of the first embodiment is expressed as follows:

${X(Y)} = {{( {Y^{2}/R} )/( {1 + {{sqrt}( {1 - {( {1 + k} ) \times ( {Y/R} )^{2}}} )}} )} + {\sum\limits_{i}\;{({Ai}) \times ( Y^{\prime} )}}}$

-   -   where:    -   X is the height of a point on the aspheric surface spaced at a        distance Y from the optical axis relative to the tangential        plane at the aspheric surface vertex;    -   Y is the distance from the point on the curve of the aspheric        surface to the optical axis;    -   R is the curvature radius of the surface of the lens element;    -   k is the conic coefficient; and    -   Ai is the i-th aspheric coefficient.

In the image capturing optical lens assembly according to the firstembodiment, when f is a focal length of the image capturing optical lensassembly, Fno is an f-number of the image capturing optical lensassembly, and HFOV is half of the maximal field of view, theseparameters have the following values:

-   -   f=3.13 mm;    -   Fno=2.65; and    -   HFOV=35.6 degrees.

In the image capturing optical lens assembly according to the firstembodiment, when the Abbe number of the first lens element 110 is V1,the Abbe number of the second lens element 120 is V2, and the Abbenumber of the third lens element 130 is V3, the following relationshipsare satisfied:V1−V2=32.1; andV3−V2=32.1.

In the image capturing optical lens assembly according to the firstembodiment, when a central thickness of the third lens element 130 isCT3, and a central thickness of the fourth lens element 140 is CT4, thefollowing relationship is satisfied:CT3/CT4=0.36.

In the image capturing optical lens assembly according to the firstembodiment, when an axial distance between the first lens element 110and the second lens element 120 is T12, and an axial distance betweenthe third lens element 130 and the fourth lens element 140 is T34, thefollowing relationship is satisfied:T34/T12=0.41.

In the image capturing optical lens assembly according to the firstembodiment, when a curvature radius of the object-side surface 121 ofthe second lens element 120 is R3, a curvature radius of the image-sidesurface 122 of the second lens element 120 is R4, a curvature radius ofthe object-side surface 131 of the third lens element 130 is R5, and acurvature radius of the image-side surface 132 of the third lens element130 is R6, the following relationships are satisfied:(R3+R4)/(R3−R4)=0.83; and(R5−R6)/(R5+R6)=−0.30.

In the image capturing optical lens assembly according to the firstembodiment, when the focal length of the image capturing optical lensassembly is f, a focal length of the second lens element 120 is f2, anda focal length of the third lens element 130 is f3, the followingrelationships are satisfied:f2/f3=0.90; andf/f3=−0.52.

In the image capturing optical lens assembly according to the firstembodiment, when a half of a diagonal length of an effectivephotosensitive area of the image sensor is Imgh, and the axial distancebetween the object-side surface 111 of the first lens element 110 andthe image plane 150 is TTL, the following relationship is satisfied:TTL/ImgH=1.70.

The detailed optical data of the first embodiment are shown in Table 1and the aspheric surface data are shown in Table 2 below.

TABLE 1 1st Embodiment f = 3.13 mm, Fno = 2.65, HFOV = 35.6 deg. SurfaceCurvature Focal # Radius Thickness Material Index Abbe # length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.109 2 Lens 1 1.273680 (ASP) 0.498Plastic 1.544 55.9 2.52 3 15.576300 (ASP) 0.123 4 Lens 2 −42.087500(ASP) 0.279 Plastic 1.634 23.8 −5.46 5 3.784800 (ASP) 0.492 6 Lens 3−1.354950 (ASP) 0.370 Plastic 1.544 55.9 −6.06 7 −2.521010 (ASP) 0.050 8Lens 4 1.119560 (ASP) 1.027 Plastic 1.530 55.8 4.30 9 1.501260 (ASP)0.500 10 IR-filter Plano 0.300 Glass 1.517 64.2 — 11 Plano 0.297 12Image Plano — Note: Reference wavelength (d-line) is 587.6 nm.

TABLE 2 Aspheric Coefficients Surface # 2 3 4 5 K = −8.02101E−01−1.00000E+00 −1.00000E+00 3.24301E+00 A4 =  5.86953E−02 −9.91439E−02−1.42409E−01 7.62741E−02 A6 = −1.46725E−01 −8.99089E−01 −1.13682E+00−6.44947E−01  A8 =  6.88119E−01  1.54539E+00  1.97931E+00 1.39383E+00A10 = −1.61679E+00 −2.17680E+00 −1.44628E+00 −9.75374E−01  A12 =−1.99874E−09  3.30950E−10 −1.16482E−09 4.15705E−01 Surface # 6 7 8 9 K =−2.00000E+01 3.36744E+00 −9.81807E+00 −1.84258E+00 A4 = −6.09553E−02−2.75154E−01  −2.27378E−01 −1.87621E−01 A6 = −6.24716E−02 4.42943E−01 1.43656E−01  8.22161E−02 A8 = −3.83171E−02 −2.82523E−01  −3.85637E−02−2.74343E−02 A10 =  5.22450E−03 8.58157E−02  3.66873E−03  5.27017E−03A12 = −1.19973E−01 1.26670E−02 −4.38663E−04

In Table 1, the curvature radius, the thickness and the focal length areshown in millimeters (mm). Surface numbers 0-12 represent the surfacessequentially arranged from the object-side to the image-side along theoptical axis. In Table 2, k represents the conic coefficient of theequation of the aspheric surface profiles. A1-A12 represent the asphericcoefficients ranging from the 1st order to the 12th order. Thisinformation related to Table 1 and Table 2 applies also to the Tablesfor the remaining embodiments, and so an explanation in this regard willnot be provided again.

FIG. 3 is a schematic view of an image capturing optical lens assemblyaccording to the second embodiment of the present disclosure. FIG. 4shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the second embodiment. In FIG. 3, the image capturing optical lensassembly includes, in order from an object side to an image side, thefirst lens element 210, an aperture stop 200, the second lens element220, the third lens element 230, the fourth lens element 240, an IR(infrared) cut filter 260 and an image plane 250.

The first lens element 210 is made of plastic material. The first lenselement 210 has positive refractive power and has a convex object-sidesurface 211 and a concave image-side surface 212. The object-sidesurface 211 and the image-side surface 212 of the first lens element 210are aspheric. The second lens element 220 is made of plastic material.The second lens element 220 has negative refractive power and has aconcave object-side surface 221 and a concave image-side surface 222.The object-side surface 221 and the image-side surface 222 of the secondlens element 220 are aspheric.

The third lens element 230 is made of plastic material. The third lenselement 230 has negative refractive power and has a concave object-sidesurface 231 and a convex image-side surface 232. The object-side surface231 and the image-side surface 232 of the third lens element 230 areaspheric.

The fourth lens element 240 is made of plastic material. The fourth lenselement 240 has positive refractive power and has a convex object-sidesurface 241 and a concave image-side surface 242. The object-sidesurface 241 and the image-side surface 242 of the fourth lens element240 are aspheric. The fourth lens element 240 has inflection pointsformed on the object-side surface 241 and the image-side surface 242thereof.

The IR cut filter 260 is made of glass and located between the fourthlens element 240 and the image plane 250, and will not affect the focallength of the image capturing optical lens assembly.

The equation of the aspheric surface profiles of the above lens elementsof the second embodiment is the same as that of the first embodiment,and will not be stated herein again.

In the image capturing optical lens assembly according to the secondembodiment the definitions of f, Fno, HFOV, V1, V2, V3, CT3, CT4, T12,T34, R3, R4, R5, R6, f2, f3, ImgH and TTL are the same as those statedin the first embodiment with corresponding values for the secondembodiment. Moreover, these parameters have the following values andsatisfy the following relationships:

f(mm) 3.06 Fno 2.50 HFOV(deg.) 35.6 V1 − V2 34.9 V3 − V2 34.9 CT3/CT40.45 T34/T12 0.20 (R3 + R4)/(R3 − R4) 0.26 (R5 − R6)/(R5 + R6) −0.22f2/f3 0.82 f/f3 −0.38 TTL/ImgH 1.80

The detailed optical data of the second embodiment are shown in Table 3and the aspheric surface data are shown in Table 4 below.

TABLE 3 2nd Embodiment f = 3.06 mm, Fno = 2.50, HFOV = 35.6 deg. SurfaceCurvature Focal # Radius Thickness Material Index Abbe # length 0 ObjectPlano Infinity 1 Lens 1 1.315880 (ASP) 0.488 Plastic 1.535 56.3 2.91 27.447100 (ASP) 0.048 3 Ape. Stop Plano 0.202 4 Lens 2 −11.850200 (ASP)0.446 Plastic 1.650 21.4 −6.71 5 6.997100 (ASP) 0.319 6 Lens 3 −1.246240(ASP) 0.412 Plastic 1.535 56.3 −8.17 7 −1.944390 (ASP) 0.050 8 Lens 41.034940 (ASP) 0.914 Plastic 1.535 56.3 4.15 9 1.342730 (ASP) 0.500 10IR-filter Plano 0.300 Glass 1.517 64.2 — 11 Plano 0.376 12 Image Plano —Note: Reference wavelength (d-line) is 587.6 nm.

TABLE 4 Aspheric Coefficients Surface # 1 2 4 5 k = −6.55534E−01−1.00000E+00 −2.44320E+02 5.00000E+00 A4 =  7.30994E−02  2.81554E−02−6.90800E−02 1.55699E−01 A6 = −1.06143E−01 −2.66434E−01 −5.56765E−01−5.62083E−01  A8 =  5.13352E−01  4.46270E−01  1.11930E+00 9.05773E−01A10 = −6.54489E−01 −8.65305E−01 −1.76086E+00 −1.00430E+00  A12 =−1.20291E−03 −1.66703E−06 −1.69531E−06 4.16787E−01 Surface # 6 7 8 9 k =−2.00063E+01 2.20896E+00 −8.52872E+00 −3.32590E+00 A4 = −7.36823E−02−3.32411E−01  −2.47385E−01 −1.66130E−01 A6 = −2.94532E−02 4.77544E−01 1.45925E−01  7.89604E−02 A8 =  4.92176E−02 −2.87099E−01  −3.55169E−02−2.87426E−02 A10 = −2.53719E−03 1.18561E−01  3.13599E−03  5.74183E−03A12 = −1.14142E−01 6.33689E−02 −4.80494E−04

FIG. 5 is a schematic view of an image capturing optical lens assemblyaccording to the third embodiment of the present disclosure. FIG. 6shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the third embodiment. In FIG. 5, the image capturing optical lensassembly includes, in order from an object side to an image side, thefirst lens element 310, an aperture stop 300, the second lens element320, the third lens element 330, the fourth lens element 340, an IR(infrared) cut filter 360 and an image plane 350.

The first lens element 310 is made of plastic material. The first lenselement 310 has positive refractive power and has a convex object-sidesurface 311 and a concave image-side surface 312. The object-sidesurface 311 and to the image-side surface 312 of the first lens element310 are aspheric.

The second lens element 320 is made of plastic material. The second lenselement 320 has negative refractive power and has a concave object-sidesurface 321 and a concave image-side surface 322. The object-sidesurface 321 and the image-side surface 322 of the second lens element320 are aspheric.

The third lens element 330 is made of plastic material. The third lenselement 330 has negative refractive power and has a concave object-sidesurface 331 and a convex image-side surface 332. The object-side surface331 and a convex image-side surface 332 of the third lens element 330are aspheric.

The fourth lens element 340 is made of plastic material. The fourth lenselement 340 has positive refractive power and has a convex object-sidesurface 341 and a concave image-side surface 342. The object-sidesurface 341 and the image-side surface 342 of the fourth lens element340 are aspheric. The fourth lens element 340 has inflection pointsformed on the object-side surface 341 and the image-side surface 342thereof.

The IR cut filter 360 is made of glass and located between the fourthlens element 340 and the image plane 350, and will not affect the focallength of the image capturing optical lens assembly.

The equation of the aspheric surface profiles of the above lens elementsof the third embodiment is the same as that of the first embodiment, andwill not be stated herein again.

In the image capturing optical lens assembly according to the thirdembodiment the definitions of f, Fno, HFOV, V1, V2, V3, CT3, CT4, T12,T34, R3, R4, R5, R6, f2, f3, ImgH and TTL are the same as those statedin the first embodiment with corresponding values for the thirdembodiment. Moreover, these parameters have the following values andsatisfy the following relationships:

f(mm) 3.32 Fno 2.60 HFOV(deg.) 33.3 V1 − V2 32.5 V3 − V2 0.0 CT3/CT40.46 T34/T12 0.26 (R3 + R4)/(R3 − R4) 0.23 (R5 − R6)/(R5 + R6) −0.28f2/f3 0.95 f/f3 −0.61 TTL/ImgH 1.78

The detailed optical data of the third embodiment are shown in Table 5and the aspheric surface data are shown in Table 6 below.

TABLE 5 3rd Embodiment f = 3.32 mm, Fno = 2.60, HFOV = 33.3 deg. SurfaceCurvature Focal # Radius Thickness Material Index Abbe # length 0 ObjectPlano Infinity 1 Lens 1 1.224110 (ASP) 0.499 Plastic 1.535 56.3 2.67 27.447100 (ASP) 0.041 3 Ape. Stop Plano 0.251 4 Lens 2 −8.594200 (ASP)0.292 Plastic 1.634 23.8 −5.21 5 5.432600 (ASP) 0.337 6 Lens 3 −1.301780(ASP) 0.340 Plastic 1.634 23.8 −5.47 7 −2.295550 (ASP) 0.075 8 Lens 41.015290 (ASP) 0.747 Plastic 1.535 56.3 3.65 9 1.575350 (ASP) 0.500 10IR-filter Plano 0.300 Glass 1.517 64.2 — 11 Plano 0.630 12 Image Plano —Note: Reference wavelength (d-line) is 587.6 nm.

TABLE 6 Aspheric Coefficients Surface # 1 2 4 5 K = −7.16264E−01−1.00000E+00 −1.09884E+02 5.00000E+00 A4 =  7.28466E−02 −3.36086E−02−7.32347E−02 1.63256E−01 A6 = −1.55769E−01 −5.08219E−02 −7.50199E−01−6.47555E−01  A8 =  6.21720E−01 −5.13164E−01  1.33756E+00 8.81400E−01A10 = −8.63411E−01  4.44357E−01 −1.05866E+00 −6.00338E−01  A12 =−1.19681E−03 −9.86714E−07 −1.01429E−06 4.16787E−01 Surface # 6 7 8 9 K =−1.89192E+01 2.81670E+00 −8.84601E+00 −4.62311E+00 A4 = −2.47703E−02−2.05671E−01  −2.38339E−01 −1.82868E−01 A6 = −2.92997E−02 4.70564E−01 1.44734E−01  8.21792E−02 A8 =  2.01168E−02 −3.22910E−01  −3.66110E−02−2.95570E−02 A10 = −2.25189E−01 8.04884E−02  3.49936E−03  5.84724E−03A12 = −1.14142E−01 2.37546E−02 −4.64142E−04

FIG. 7 is a schematic view of an image capturing optical lens assemblyaccording to the fourth embodiment of the present disclosure. FIG. 8shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the fourth embodiment. In FIG. 7, the image capturing optical lensassembly includes, in order from an object side to an image side, anaperture stop 400, the first lens element 410, the second lens element420, the third lens element 430, the fourth lens element 440, an IR(infrared) cut filter 460 and an image plane 450.

The first lens element 410 is made of plastic material. The first lenselement 410 has positive refractive power and has a convex object-sidesurface 411 and a concave image-side surface 412. The object-sidesurface 411 and the image-side surface 412 of the first lens element 410are aspheric.

The second lens element 420 is made of plastic material. The second lenselement 420 has negative refractive power and has a concave object-sidesurface 421 and a concave image-side surface 422. The object-sidesurface 421 and the image-side surface 422 of the second lens element420 are aspheric.

The third lens element 430 is made of plastic material. The third lenselement 430 has negative refractive power and has a concave object-sidesurface 431 and a convex image-side surface 432. The object-side surface431 and the image-side surface 432 of the third lens element 430 areaspheric.

The fourth lens element 440 is made of plastic material. The fourth lenselement 440 has negative refractive power and has a convex object-sidesurface 441 and a concave image-side surface 442. The object-sidesurface 441 and the image-side surface 442 of the fourth lens element440 are aspheric. The fourth lens element 440 has inflection pointsformed on the object-side surface 441 and the image-side surface 442thereof.

The IR cut filter 460 is made of glass and located between the fourthlens element 440 and the image plane 450, and will not affect the focallength of the image capturing optical lens assembly.

The equation of the aspheric surface profiles of the above lens elementsof the fourth embodiment is the same as that of the first embodiment,and will not be stated herein again.

In the image capturing optical lens assembly according to the fourthembodiment the definitions of f, Fno, HFOV, V1, V2, V3, CT3, CT4, T12,T34, R3, R4, R5, R6, f2, f3, ImgH and TTL are the same as those statedin the first embodiment with corresponding values for the fourthembodiment. Moreover, these parameters have the following values andsatisfy the following relationships:

f(mm) 3.47 Fno 2.80 HFOV(deg.) 32.4 V1 − V2 32.5 V3 − V2 32.5 CT3/CT41.48 T34/T12 1.96 (R3 + R4)/(R3 − R4) 0.81 (R5 − R6)/(R5 + R6) −0.34f2/f3 0.46 f/f3 −0.37 TTL/ImgH 1.67

The detailed optical data of the fourth embodiment are shown in Table 7and the aspheric surface data are shown in Table 8 below.

TABLE 7 4th Embodiment f = 3.47 mm, Fno = 2.80, HFOV = 32.4 deg. SurfaceCurvature Focal # Radius Thickness Material Index Abbe # length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.180 2 Lens 1 1.049080 (ASP) 0.482Plastic 1.544 55.9 1.98 3 30.835600 (ASP) 0.070 4 Lens 2 −29.053900(ASP) 0.260 Plastic 1.632 23.4 −4.32 5 3.021800 (ASP) 0.529 6 Lens 3−2.328450 (ASP) 0.729 Plastic 1.544 55.9 −9.48 7 −4.710500 (ASP) 0.137 8Lens 4 1.389570 (ASP) 0.493 Plastic 1.544 55.9 −44.65 9 1.150070 (ASP)0.450 10 IR-filter Plano 0.400 Glass 1.517 64.2 — 11 Plano 0.254 12Image Plano — Note: Reference wavelength (d-line) is 587.6 nm.

TABLE 8 Aspheric Coefficients Surface # 2 3 4 5 k = −6.12604E−01−1.00000E+00 −1.00000E+00 1.01208E+01 A4 =  5.21816E−02 −1.25487E−01−1.77062E−02 1.54736E−01 A6 =  7.59986E−02 −9.63337E−02  6.82382E−022.38064E−01 A8 = −6.94473E−01 −5.77796E−01 −2.00816E−01 1.36516E−01 A10=  1.96333E+00  2.03706E+00  3.57463E−01 5.94549E−01 A12 = −2.37642E+00−4.59311E+00  1.11557E+00 8.80708E−01 A14 = −1.98236E+00  3.01863E−05−5.32128E+00 3.01598E−05 Surface # 6 7 8 9 k = −9.96092E+00 8.56904E+00−9.15983E+00 −5.51164E+00 A4 = −2.15987E−01 −5.89115E−01  −6.06262E−01−2.59364E−01 A6 = −1.11782E−01 8.15650E−01  3.16725E−01  1.37765E−01 A8= −9.12295E−01 −8.21883E−01  −4.18996E−02 −5.58302E−02 A10 = 3.02964E+00 3.95292E−01 −5.35131E−03  1.12579E−02 A12 = −3.23305E+001.33161E−01 −2.89722E−04  3.18566E−05 A14 = −1.64877E+00 −1.78524E−01  1.01988E−03 −5.85614E−04 A16 =  3.86723E+00 3.98864E−02 −2.50793E−04 9.42212E−05

FIG. 9 is a schematic view of an image capturing optical lens assemblyaccording to the fifth embodiment of the present disclosure. FIG. 10shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the fifth embodiment. In FIG. 9, the image capturing optical lensassembly includes, in order from an object side to an image side, anaperture stop 500, the first lens element 510, the second lens element520, the third lens element 530, the fourth lens element 540, an IR(infrared) cut filter 560 and an image plane 550.

The first lens element 510 is made of plastic material. The first lenselement 510 has positive refractive power and has a convex object-sidesurface 511 and a concave image-side surface 512. The object-sidesurface 511 and the image-side surface 512 of the first lens element 510are aspheric.

The second lens element 520 is made of plastic material. The second lenselement 520 has negative refractive power and has a concave object-sidesurface 521 and a concave image-side surface 522. The object-sidesurface 521 and the image-side surface 522 of the second lens element520 are aspheric.

The third lens element 530 is made of plastic material. The third lenselement 530 has negative refractive power and has a concave object-sidesurface 531 and a convex image-side surface 532. The object-side surface531 and the image-side surface 532 of the third lens element 530 areaspheric.

The fourth lens element 540 is made of plastic material. The fourth lenselement 540 has positive refractive power and has a convex object-sidesurface 541 and a concave image-side surface 542. The object-sidesurface 541 and the image-side surface 542 of the fourth lens element540 are aspheric. The fourth lens element 540 has inflection pointsformed on the object-side surface 541 and the image-side surface 542thereof.

The IR cut filter 560 is made of glass and located between the fourthlens element 540 and the image plane 550, and will not affect the focallength of the image capturing optical lens assembly.

The equation of the aspheric surface profiles of the above lens elementsof the fifth embodiment is the same as that of the first embodiment, andwill not be stated herein again.

In the image capturing optical lens assembly according to the fifthembodiment the definitions of f, Fno, HFOV, V1, V2, V3, CT3, CT4, T12,T34, R3, R4, R5, R6, f2, f3, ImgH and TTL are the same as those statedin the first embodiment with corresponding values for the fifthembodiment. Moreover, these parameters have the following values andsatisfy the following relationships:

f(mm) 3.26 Fno 2.65 HFOV(deg.) 33.0 V1 − V2 32.0 V3 − V2 6.4 CT3/CT40.40 T34/T12 0.31 (R3 + R4)/(R3 − R4) 0.69 (R5 − R6)/(R5 + R6) −0.33f2/f3 1.10 f/f3 −0.69 TTL/ImgH 1.74

The detailed optical data of the fifth embodiment are shown in Table 9and the aspheric surface data are shown in Table 10 below.

TABLE 9 5th Embodiment f = 3.26 mm, Fno = 2.65, HFOV = 33.0 deg. SurfaceCurvature Focal # Radius Thickness Material Index Abbe # length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.173 2 Lens 1 1.110950 (ASP) 0.559Plastic 1.530 55.8 2.60 3 4.761900 (ASP) 0.159 4 Lens 2 −21.276600 (ASP)0.274 Plastic 1.634 23.8 −5.22 5 3.939500 (ASP) 0.518 6 Lens 3 −1.240350(ASP) 0.348 Plastic 1.583 30.2 −4.75 7 −2.479350 (ASP) 0.050 8 Lens 40.985550 (ASP) 0.866 Plastic 1.530 55.8 3.40 9 1.513870 (ASP) 0.500 10IR-filter Plano 0.300 Glass 1.517 64.2 — 11 Plano 0.440 12 Image Plano —Note: Reference wavelength (d-line) is 587.6 nm

TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 k = −5.71015E−01 2.44971E+01 −1.00000E+00 6.11220E+00 A4 =  5.64880E−02 −4.94792E−03−1.46219E−01 6.12581E−02 A6 =  1.92404E−01 −8.28671E−01 −1.09210E+00−6.30114E−01  A8 = −1.78988E−01  1.46467E+00  1.65675E+00 1.06303E+00A10 = −9.77720E−02 −3.52170E+00 −4.08563E+00 −8.49763E−01  A12 = 2.45215E−08 −1.90835E−07  9.14555E−08 8.22213E−01 Surface # 6 7 8 9 k =−1.48592E+01 3.43500E+00 −8.25452E+00 −2.21152E+00 A4 = −2.49725E−02−2.96800E−01  −2.21896E−01 −1.88384E−01 A6 = −2.24217E−01 4.80275E−01 1.40494E−01  8.34276E−02 A8 =  1.79194E−01 −3.21904E−01  −3.72843E−02−2.68082E−02 A10 = −8.99877E−03 7.28975E−02  3.81633E−03  5.23350E−03A12 = −2.85774E−01 2.69903E−02  1.72255E−04 −4.42651E−04 A14 =−5.06490E−05  3.92919E−06

FIG. 11 is a schematic view of an image capturing optical lens assemblyaccording to the sixth embodiment of the present disclosure. FIG. 12shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the sixth embodiment. In FIG. 11, the image capturing optical lensassembly includes, in order from an object side to an image side, anaperture stop 600, the first lens element 610, the second lens element620, the third lens element 630, the fourth lens element 640, an IR(infrared) cut filter 660 and an image plane 650.

The first lens element 610 is made of plastic material. The first lenselement 610 has positive refractive power and has a convex object-sidesurface 611 and a concave image-side surface 612. The object-sidesurface 611 and the image-side surface 612 of the first lens element 610are aspheric.

The second lens element 620 is made of plastic material. The second lenselement 620 has negative refractive power and has a concave object-sidesurface 621 and a concave image-side surface 622. The object-sidesurface 621 and the image-side surface 622 of the second lens element620 are aspheric.

The third lens element 630 is made of plastic material. The third lenselement 630 has negative refractive power and has a concave object-sidesurface 631 and a convex image-side surface 632. The object-side surface631 and the image-side surface 632 of the third lens element 630 areaspheric.

The fourth lens element 640 is made of plastic material. The fourth lenselement 640 has positive refractive power and has a convex object-sidesurface 641 and a concave image-side surface 642. The object-sidesurface 641 and the image-side surface 642 of the fourth lens element640 are aspheric. The fourth lens element 640 has inflection pointsformed on the object-side surface 641 and the image-side surface 642thereof.

The IR cut filter 660 is made of glass and located between the fourthlens element 640 and the image plane 650, and will not affect the focallength of the image capturing optical lens assembly.

The equation of the aspheric surface profiles of the above lens elementsof the sixth embodiment is the same as that of the first embodiment, andwill not be stated herein again.

In the image capturing optical lens assembly according to the sixthembodiment the definitions of f, Fno, HFOV, V1, V2, V3, CT3, CT4, T12,T34, R3, R4, R5, R6, f2, f3, ImgH and TTL are the same as those statedin the first embodiment with corresponding values for the sixthembodiment. Moreover, these parameters have the following values andsatisfy the following relationships:

f(mm) 3.25 Fno 2.65 HFOV(deg.) 33.3 V1 − V2 32.5 V3 − V2 32.7 CT3/CT40.47 T34/T12 0.36 (R3 + R4)/(R3 − R4) 0.63 (R5 − R6)/(R5 + R6) −0.45f2/f3 1.23 f/f3 −0.84 TTL/ImgH 1.82

The detailed optical data of the sixth embodiment are shown in Table 11and the aspheric surface data are shown in Table 12 below.

TABLE 11 6th Embodiment f = 3.25 mm, Fno = 2.65, HFOV = 33.3 deg.Surface Curvature Focal # Radius Thickness Material Index Abbe # length0 Object Plano Infinity 1 Ape. Stop Plano −0.139 2 Lens 1 1.271630 (ASP)0.554 Plastic 1.535 56.3 2.51 3 20.000000 (ASP) 0.137 4 Lens 2−16.482800 (ASP) 0.386 Plastic 1.634 23.8 −4.77 5 3.733200 (ASP) 0.492 6Lens 3 −1.205760 (ASP) 0.450 Plastic 1.543 56.5 −3.87 7 −3.201800 (ASP)0.050 8 Lens 4 0.902850 (ASP) 0.966 Plastic 1.530 55.8 2.87 9 1.399050(ASP) 0.500 10 IR-filter Plano 0.300 Glass 1.517 64.2 — 11 Plano 0.35212 Image Plano — Note: Reference wavelength (d-line) is 587.6 nm.

TABLE 12 Aspheric Coefficients Surface # 2 3 4 5 k = −6.42522E−01 5.00000E+01 −1.00000E+00 1.00965E+01 A4 =  3.93817E−02  3.81559E−02−1.75537E−02 9.98880E−02 A6 =  1.47946E−01 −6.85904E−01 −9.55982E−01−5.90993E−01  A8 = −1.60916E−01  1.31517E+00  1.74609E+00 1.03308E+00A10 = −2.19531E−01 −2.51584E+00 −3.05078E+00 −1.21029E+00  A12 = 2.39237E−08 −1.33191E−07  5.96448E−08 6.88550E−01 Surface # 6 7 8 9 k =−1.61448E+01 6.50165E+00 −6.50611E+00 −2.07285E+00 A4 = −1.00970E−01−4.35899E−01  −2.21652E−01 −1.86338E−01 A6 = −2.44960E−01 5.05802E−01 1.36078E−01  8.34935E−02 A8 =  2.43533E−01 −3.02678E−01  −3.66538E−02−2.73468E−02 A10 =  4.69268E−02 7.74137E−02  3.96467E−03  5.26591E−03A12 = −3.66392E−01 2.98614E−02  1.72251E−04 −4.33521E−04 A14 =−5.58902E−05  4.77098E−06

FIG. 13 is a schematic view of an image capturing optical lens assemblyaccording to the seventh embodiment of the present disclosure. FIG. 14shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing optical lens assembly accordingto the seventh embodiment. In FIG. 13, the image capturing optical lensassembly includes, in order from an object side to an image side, thefirst lens element 710, an aperture stop 700, the second lens element720, the third lens element 730, the fourth lens element 740, an IR(infrared) cut filter 760 and an image plane 750.

The first lens element 710 is made of plastic material. The first lenselement 710 has positive refractive power and has a convex object-sidesurface 711 and a concave image-side surface 712. The object-sidesurface 711 and the image-side surface 712 of the first lens element 710are aspheric.

The second lens element 720 is made of plastic material. The second lenselement 720 has negative refractive power and has a concave object-sidesurface 721 and a concave image-side surface 722. The object-sidesurface 721 and the image-side surface 722 of the second lens element720 are aspheric.

The third lens element 730 is made of plastic material. The third lenselement 730 has negative refractive power and has a concave object-sidesurface 731 and a convex image-side surface 732. The object-side surface731 and the image-side surface 732 of the third lens element 730 areaspheric.

The fourth lens element 740 is made of plastic material. The fourth lenselement 740 has positive refractive power and has a convex object-sidesurface 741 and a concave image-side surface 742. The object-sidesurface 741 and the image-side surface 742 of the fourth lens element740 are aspheric. The fourth lens element 740 has inflection pointsformed on the object-side surface 741 and the image-side surface 742thereof.

The IR cut filter 760 is made of glass and located between the fourthlens element 740 and the image plane 750, and will not affect the focallength of the image capturing optical lens assembly.

The equation of the aspheric surface profiles of the above lens elementsof the seventh embodiment is the same as that of the first embodiment,and will not be stated herein again.

In the image capturing optical lens assembly according to the seventhembodiment the definitions of f, Fno, HFOV, V1, V2, V3, CT3, CT4, T12,T34, R3, R4, R5, R6, f2, f3, ImgH and TTL are the same as those statedin the first embodiment with corresponding values for the seventhembodiment. Moreover, these parameters have the following values andsatisfy the following relationships:

f(mm) 3.44 Fno 2.90 HFOV(deg.) 31.8 V1 − V2 32.5 V3 − V2 32.7 CT3/CT40.38 T34/T12 0.40 (R3 + R4)/(R3 − R4) 0.11 (R5 − R6)/(R5 + R6) −0.43f2/f3 0.96 f/f3 −0.82 TTL/ImgH 1.91

The detailed optical data of the seventh embodiment are shown in Table13 and the aspheric surface data are shown in Table 14 below.

TABLE 13 7th Embodiment f = 3.44 mm, Fno = 2.90, HFOV = 31.8 deg.Surface Curvature Focal # Radius Thickness Material Index Abbe # length0 Object Plano Infinity 1 Lens 1 1.300600 (ASP) 0.531 Plastic 1.535 56.32.47 2 80.321300 (ASP) 0.050 3 Ape. Stop Plano 0.101 4 Lens 2 −5.843200(ASP) 0.622 Plastic 1.634 23.8 −4.02 5 4.710500 (ASP) 0.486 6 Lens 3−1.263170 (ASP) 0.377 Plastic 1.543 56.5 −4.18 7 −3.145900 (ASP) 0.060 8Lens 4 0.952700 (ASP) 0.981 Plastic 1.530 55.8 2.97 9 1.549380 (ASP)0.500 10 IR-filter Plano 0.300 Glass 1.517 64.2 — 11 Plano 0.383 12Image Plano — Note: Reference wavelength (d-line) is 587.6 nm

TABLE 14 Aspheric Coefficients Surface # 1 2 4 5 k = −4.26925E−01 4.70317E+01 −1.00000E+00 1.93452E+01 A4 =  5.55745E−02  1.21300E−01 2.86512E−02 1.20609E−01 A6 =  9.39548E−02 −2.87574E−01 −4.74592E−01−5.15074E−01  A8 =  1.61305E−02  4.56422E−01  1.20302E+00 1.00134E+00A10 = −7.99044E−03 −4.70604E−01 −2.75465E+00 −1.25219E+00  A12 =−5.46487E−06 −3.90501E−06 −3.72229E−06 5.55177E−01 Surface # 6 7 8 9 k =−2.00000E+01 5.45672E+00 −7.86042E+00 −1.76361E+00 A4 = −1.19805E−01−4.35941E−01  −2.22047E−01 −1.88592E−01 A6 = −1.99081E−01 4.90531E−01 1.36854E−01  8.31198E−02 A8 =  2.44442E−01 −3.12017E−01  −3.65796E−02−2.74184E−02 A10 =  5.70210E−03 7.97899E−02  3.92287E−03  5.24711E−03A12 = −3.23580E−01 3.36807E−02  1.67532E−04 −4.35283E−04 A14 =−5.55869E−05  6.44836E−06

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentinvention without departing from the scope or spirit of the invention.In view of the foregoing, it is intended that the present inventioncover modifications and variations of this invention provided they fallwithin the scope of the following claims.

What is claimed is:
 1. An image capturing optical lens assemblycomprising, in order from an object side to an image side: a first lenselement with positive refractive power having a convex object-sidesurface and a concave image-side surface; a second lens element withnegative refractive power; a third lens element with negative refractivepower having a concave object-side surface and a convex image-sidesurface; and a fourth lens element with refractive power having aconcave image-side surface, wherein the object-side surface and theimage-side surface of the fourth lens element are aspheric, and thefourth lens element has at least one inflection point formed on at leastone of the object-side surface and the image-side surface thereof;wherein a focal length of the image capturing optical lens assembly isf, a focal length of the third lens element f3, an axial distancebetween the first lens element and the second lens element is T12, anaxial distance between the third lens element and the fourth lenselement is T34, a curvature radius of the object-side surface of thesecond lens element is R3, a curvature radius of the image-side surfaceof the second lens element is R4, and the following relationships aresatisfied:−1.5<f/f3<−0.2;0<T34/T12<2.1; and(R3+R4)/(R3−R4)<1.0.
 2. The image capturing optical lens assembly ofclaim 1, wherein the fourth lens element has a convex object-sidesurface, the focal length of the image capturing optical lens assemblyis f, the focal length of the third lens element is f3, and thefollowing relationship is satisfied:−1.2<f/f3<−0.3.
 3. The image capturing optical lens assembly of claim 2,wherein the fourth lens element has positive refractive power.
 4. Theimage capturing optical lens assembly of claim 3, wherein a curvatureradius of the object-side surface of the third element is R5, acurvature radius of the image-side surface of the third lens element isR6, and the following relationship is satisfied:−0.5<(R5−R6)/(R5+R6)<−0.2.
 5. The image capturing optical lens assemblyof claim 4, wherein a focal length of the second lens element is f2, thefocal length of the third lens element is f3, and the followingrelationship is satisfied:0.7<f2/f3<1.3.
 6. The image capturing optical lens assembly of claim 4,wherein the Abbe number of the first lens element is V1, the Abbe numberof the second lens element is V2, and the following relationship issatisfied:30<V1−V2<45,
 7. The image capturing optical lens assembly of claim 3,wherein the axial distance between the first lens element and the secondlens element is T12, the axial distance between the third lens elementand the fourth lens element is T34, and the following relationship issatisfied':0 T34/T12<1.0,
 8. The image capturing optical lens assembly of claim 7,wherein the Abbe number of the second lens element is V2, the Abbenumber of the third lens element is V3, and the following relationshipis satisfied:23<V3−V2<42.
 9. The image capturing optical lens assembly of claim 7,wherein a central thickness of the third lens element is CT3, a centralthickness of the fourth lens element is CT4, and the followingrelationship is satisfied:0.25<CT3/CT4<0.6.
 10. The image capturing optical lens assembly of claim2, wherein the focal length of the image capturing optical lens assemblyis f, the focal length of the third lens element is f3, and thefollowing relationship is satisfied:−1.0<f/f3<−0.5.
 11. The image capturing optical lens assembly of claim2, further comprising: an image sensor located on an image plane,wherein a half of a diagonal length of an effective photosensitive areaof the image sensor is ImgH, the axial distance between the object-sidesurface of the first lens element and the image plane is TTL, and thefollowing relationship is satisfied:TTL/ImgH<2.0.